Krypton isotopic signature study of the primary coolant of CANDU nuclear power plant

  • Weihua Zhang
  • Kurt Ungar
  • Ian Hoffman
  • Ryan Lawrie


To support interpretation of observed atmospheric krypton radioisotopes, a database of krypton radioisotope in the primary coolant of CANDU reactors has been established. This database is comprised of 40,000 records of high-quality 89Kr, 87Kr, 88Kr and 85mKr analyses. Records from the database were retrieved by a specifically designed data-mining module and subjected to further analysis. Results from the analysis were subsequently used to study isotopic ratios of observed krypton radioisotopes in the CANDU reactor primary coolant. These studies provided practical information on the characterization of CANDU reactor krypton radioisotope, which can potentially be used to discriminate between reactor effluent and fuel reprocessing for nuclear safeguard 85Kr monitoring applications (Kalinowski et al., J Environ Radioact 73:203, 2004). The study also has some potential application to Fissile material cut-off treaty.


Noble gas Reactor primary coolant Database inventories Krypton radioisotope 



We are grateful to Mr. J. David Swann and his thesis supervisor professor Brent J. Lewis from the Royal Military College of Canada, for providing thesis information, and valuable noble gas activity data.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • Weihua Zhang
    • 1
  • Kurt Ungar
    • 1
  • Ian Hoffman
    • 1
  • Ryan Lawrie
    • 1
  1. 1.Radiation Protection Bureau of Health CanadaOttawaCanada

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